I've seen them advertised on kingsnake once, "this is your ONE CHANCE to get a TRULY RARE tortoise, these guys won't last long!!" Something to that tune... Pure bologna if you ask me!
Funny how something that he initially claimed was "a mistake" can create something that is worth several times the amount of the pure animal on either side. If they sell (and they may have already), makes it awfully tempting to "accidentally" let the same "mistake" happen again, doesn't it?
Muts can be cool... have a little of everything in them usually makes for a cool personality (speaking particularly about dogs) but why would they cost more. Any other "mut" would be severely less